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fork() vs vfork()

To: <linux-mips@oss.sgi.com>
Subject: fork() vs vfork()
From: "kjlin" <kj.lin@viditec-netmedia.com.tw>
Date: Thu, 20 Sep 2001 14:51:08 +0800
Sender: owner-linux-mips@oss.sgi.com
Hi all,
 
How does linux-mips treat the vfork() function?
I can see the fork() implemented in syscall.c as following:
 
save_static_function(sys_fork);
static_unused int _sys_fork(struct pt_regs regs)
{
        int res;
        res = do_fork(SIGCHLD, regs.regs[29], &regs, 0);
        return res;
}
 
But i can't see anything about vfork/sys_vfork in mips platform.
However, the vfork() was implemented as sys_vfork in other architecture.
Such as arm platform:
asmlinkage int sys_vfork(struct pt_regs *regs)
{
        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0);
}
 
Why not do the same "sys_vfork" in linux-mips?
Does it mean that MIPS does not support vfork() or vfork() is equal to fork() in MIPS platform?

Thanks,
KJ
 
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